Unochinja kuti RFID reader inonzwisisika sei nesarudzo yega yega yekugadzira. Kwaunoisa antenna uye zvikamu zvinosarudza kuti muverengi anowana sei uye anotaura sei nematagi. Dhizaini ye antenna inochinja kuti inogona kuverenga kure zvakadii uye kuti inogona kuverenga zvakadii. Linear polarization inogona kurasikirwa nemasaini kana matagi asina kurongeka. Circular polarization inoshanda zvirinani kunyangwe matagi ari pamakona asinganzwisisike. Sarudzo dzedhizaini dzakakosha zvikuru pedyo nesimbi kana mvura.
Simbi inosvetuka-svetuka uye zvinoita kuti nzvimbo dzekuverengera dziome kufanotaura.
Mvura inonwisa simba reRF uye inoita kuti zviome kuverenga ma tag pazvinhu zvakanyorova.
Unogona kuona matambudziko aya mukushandiswa kweRFID kakawanda. Dhizaini yakanaka inobatsira sisitimu kushanda zviri nani uye inoita kuti ive yakavimbika.
Zvitsva Zvitsva
Antenna dhizaini Zvakakosha zvikuru kuti RFID reader ionekwe zvakanaka. Sarudza saizi nechimiro chakakodzera kuti zvive nani pakusarudza nzvimbo uye kurongeka.
Kurongeka kwakanaka kwekutevera uye nzira yekufambisa mashoko inoita kuti zviratidzo zvisimbe. Shandisa nzira dzakakura uye usashandise nzira dzakapinza dzekudzivirira kurasikirwa kwemashoko.
Nzira dzakanaka dzepasi dzinoderedza ruzha nekukanganisa. Shandisa mapuraneti epasi anoenderera mberi uye macapacitor ekuparadzanisa kuti uwane mhedzisiro iri nani.
Gadzirisa polarization ye antenna negwara re tag. Iyi match inobatsira kuverenga nemazvo, kunyanya kana zvinhu zvichifamba.
Edza dhizaini yako mumamiriro ezvinhu chaiwo. Izvi zvinowana matambudziko nekukurumidza uye zvinoita kuti RFID system ishande zvakanaka.
Sarudzo dzeMagadzirirwo Dzinokanganisa Kunzwisisa kweRFID
Nguva dzese paunosarudza dhizaini, unochinja kuti RFID reader inonzwisisika zvakadii. Maitiro aunoita matrace, kupwanya bhodhi, uye kuisa antenna anokanganisa mashandiro anoita system yacho. Kana ukashandisa yakanaka PCB dhizaini, unogona kuita kuti sisitimu ishande zviri nani, ive yakarurama, uye yakachengeteka. Ngationei kuti sarudzo idzi dzinokosha sei muhupenyu chaihwo.
Trace Layout uye Routing
Kurongeka kwetrace uye nzira yekutumira zvinhu zvakakosha pakufamba kwesignali muRFID system yako. Kusafamba zvakanaka kwetrace kunoita kuti masignali asashande zvakanaka uye kunoderedza huwandu hwekuverenga. Unofanira kuronga upamhi hwetrace uye nzvimbo yacho nokungwarira. Zviratidzo zvakakura zvinoreva kushomeka kwekudzivirira uye kuwedzera kwekuwedzera. Nzvimbo yakanaka inomisa kugona kwakawedzerwa uye inobatsira kunyatsoita zvinhu nemazvo.
Heino tafura ine ma parameter ekutevera eRFID reader circuits:
Parameter | Yakakurudzirwa Range | Notes |
|---|---|---|
Trace wide | 0.2-1.0 mm | Yakafara = kushomeka kwakaderera = Q yakakwira |
Nzvimbo yekutevedzana kwekutevera | 0.2-0.5 mm | Nzvimbo yakakura = kugona kwezvipembenene zvishoma |
Usashandise makomba akapinza e90° mumatanho ekutevedzana. Shandisa makona e135° kuderedza kurasikirwa kwechiratidzo. Isa maantenna kure nematara edhijitari kuti umise kupindirana. Kuronga kwepair yakasiyana kunobatsira matara ekukurumidza. Unogona kufananidza hurefu nenzvimbo kuti matara echiratidzo arambe akaenzana. Kuronga kwepair kunokosha zvikuru mukugadzirwa kwetara yeUHF RFID. Kana ukatevedzera mitemo iyi, unowana kushanda kwakanaka uye kuchengetedzeka.
Zano: Dzora marongero ekumhanya kwepamusoro uchishandisa makona akakombama akakosha. Izvi zvinomisa matambudziko ekudzivirira uye zvinoita kuti RFID system yako irambe yakasimba.
Grounding uye Power Distribution
Kudzika pasi uye kugoverwa kwesimba zvinoshandura ruzha uye mhando yemasaini muRFID system yako. Maseketi akanaka ekudzivirira pasi kubva mukukanganiswa kwemagetsi. Unogona kushandisa mabhokisi esimbi nendege dzepasi kuderedza ruzha muhurongwa hweUHF neLF RFID.
Heano maitiro akanakisa ekuisa pasi uye kugoverwa kwesimba:
Maitiro Akanyanya | tsananguro |
|---|---|
Ruzha rwakaderera uye kupindira, zvichiita kuti masaini ave nani pamafrequencies akakwira. | |
Decoupling Capacitors | Chengeta simba rakagadzikana uye misa shanduko dzemagetsi dzinokanganisa masaini. |
Gadzirisa Kugadzika kweComponent | Zvikamu zvinosungirirwa pamusoro zvine kubatanidza ne-in-pad kana thermal relief kune pasi. |
Ground Planes | Ndege dzepasi dzinoramba dzichidzivirira ruzha. Ndege dzakawanda dzepasi dzinoita kuti pasi pave nesimba. |
Isa ma capacitor ekuparadzanisa pamagetsi. Izvi zvinoderedza ruzha rwemagetsi uye zvinosimudzira mashandiro. Mazhinji ma grounding vias ari pedyo nezvikamu zvakakosha anocheka ruzha rwekusvetuka pasi. Ma Carrier Noise Reduction modules anokiya masaini uye anoderedza ruzha rwekudonha kwemvura. Sarudzo idzi dzinokubatsira kuchengetedza kururama uye kuchengetedzeka muma RFID reader circuits.
Cherechedza: Kudzika zvakanaka kunodzivirira macircuit e oscillator ne demodulator kubva pakukanganiswa kwemagetsi. Izvi zvakakosha zvikuru pamhando yemasaini uye huwandu hwekuverenga.
Kugadzira uye Kutungamira MaAntena
Kugadzira uye kurongeka kwema antenna ndizvo zvakakosha kuti antenna inzwe RFID. Saizi, chimiro, uye nzvimbo yeantenna zvinoshandura kuti muverengi anotaura sei nematagi. Kana ukasagadzirisa antenna zvakanaka, antenna uye range zvinodzikira. Unofanira kufananidza antenna polarization ne tag orientation kuti uwane mhedzisiro yakanaka.
Dhizaini yeantena inochinja mhinduro yema frequency, input impedance, uye gain.
Kuisa maantenna pedyo nesimbi kunogona kukanganisa masaini uye kuderedza kunyatsorongeka.
Kushandisa maantenna akawanda kunogona kufukidza nzvimbo yakawanda asi kunoda kugadziriswa nokungwarira kuti kurege kukanganisa.
Sarudza antenna yakakodzera zvaunoda zveRFID. Muhurongwa hweUHF, kugadzika kweantenna uye gwara zvinonyanya kukosha. Unogona kuwedzera mashandiro nekuisa ma antenna mumutsara ne tag polarization. Kana ukachengeta ma antenna kure nema digital traces, unomisa kupindira. Sarudzo idzi dzinokubatsira kuwana tekinoroji yeRFID yakavimbika uye kuchengetedzeka kuri nani.
Callout: Dhizaini yeAntena neMicrochip chinja mhinduro yefrequency uye kuwedzera. Nyaya uye kwaunoshandisa sisitimu zvinokanganisawo mashandiro anoita RFID yako.
Unogona kuona kuti sarudzo yega yega yedhizaini inochinja sei mashandiro anoita RFID reader yako. Kana ukashandisa nzira dzakanakisisa mu trace layout, grounding, uye antenna setup, unowana kururama kuri nani, kuverenga kuri nani, uye kuchengetedzeka kuri nani mune ese maRFID systems.
Kuwanda uye Polarization muRFID Design
Kururama kweMashandiro Ekushanda
Zvakakosha kuchengetedza frequency yekushanda yakadzikama mune yega yega RFID system. Frequency inodzora kuti muverengi wako anotaura kusvika papi uye zvakanaka sei nematagi. Kana frequency ikachinja, huwandu hwekuverenga uye kururama kunowedzera kuipa. Kurongeka kwePCB nezvinhu inobatsira kuchengetedza frequency yakagadzikana nekufamba kwenguva uye nekuchinja kwetembiricha. Unogona kuona izvi mutafura iri pazasi:
Kuonekwa | Tsanangudzo |
|---|---|
Frequency Kugadzikana | Zvinhu zvePCB uye marongerwo azvo zvinobatsira kuchengetedza mafrequency akadzikama sezvo nguva netembiricha zvichichinja. |
Kuderedza Kupindira | The Kurongeka kwePCB kwakakosha zvikuru kuderedza kukanganiswa uye kuve nechokwadi chekuti RFID reader ne tag zvinotaura zvakanaka. |
Unofanira kugara uchitarisa dhizaini yako kuti uve nechokwadi chekuti frequency inoramba yakadzikama. Izvi zvinobatsira tekinoroji yako yeRFID kushanda zvirinani mumamiriro ese ezvinhu.
Kupatsanurana kweAntena uye Kutungamira kweTag
Kupatsanura maAntena ndiko kufamba kwemafungu eredhiyo. MuRFID, unofanirwa kufananidza kupatsanura kwemaantenna nekutungamira kwetag. Kana ukashandisa linear polarization, ma tag nema reader antenna anofanirwa kutarisana nenzira imwe chete. Kana zvikasadaro, unorasikirwa nesignali uye range. Musiyano wemadhigirii makumi mapfumbamwe zvinogona kuita kuti mashandiro awedzere kuipa. Kutenderera kwedenderedzwa kunoita kuti uverenge ma tag chero kupi. Izvi zvakanaka kana ma tag achifamba kana kugara pamakona akasiyana.
Tip: Tarisa gwara re tagIta shuwa kuti polarization ye tag antenna inoenderana nemuverengi. Izvi zvinokubatsira kuti uverenge ma tag zviri nani uye nemazvo.
Unogona kushandisa denderedzwa polarization muUHF RFID kuti uverenge ma tag munzvimbo dzakawanda. Izvi zvinoita kuti system yako ishande zviri nani uye igare yakachengeteka.
Kuve nechokwadi chekuti mashandiro anoitwa kakawanda
Unofanira kutevera matanho akanaka ekuchengetedza RFID system yako ichishanda nema frequency akakodzera. Heano mamwe matanho aunogona kushandisa:
Sarudza zvinodiwa neapp yako. Sarudza bhendi rema frequency akakodzera, nzvimbo yekuverenga, uye rudzi rwe tag.
Sarudza rudzi rweantenna rwakanakira kushandisa. Sarudza kubva pa antenna dze dipole, loop, kana patch.
Tarisa saizi nechimiro cheantenna kuti zvienderane nesystem yako.
Tarisa zvinhu zvemagetsi zvakaita se gain, impedance matching, uye polarization.
Edza dhizaini yako muhupenyu chaihwo. Shandisa masimulation uye chinja kana zvichidikanwa.
Ramba uchivandudza dhizaini yako kuti uwane mhedzisiro iri nani uye kuchengetedzeka.
Masisitimu eUHF RFID anoda kunyatsotarisirwa kuti awane gwara uye atungamirire. Magadzirirwo akanaka eantenna nePCB zvinokubatsira kuti uwane kururama kuri nani uye huwandu hwekuverenga. Unogona kushandisa matanho aya kuti uwane mhedzisiro yakanakisa kubva kuRFID tekinoroji yako mumashandisirwo ese.
Kutarisira Kuvimbika kweSignali uye Ruzha
Kuvimbika kwemasaini uye kudzora ruzha zvakakosha zvikuru kune masisitimu eRFID. Kana uchida kuti muverengi wako weRFID ashande zvakanaka, unofanirwa kudzora kurasikirwa kwemasaini uye kupindira. Mhedzisiro yemaparasitic inogonawo kuchinja kuti RFID yako inoshanda kusvika papi uye zvakanaka sei. Zvinhu izvi zvinogona kukanganisa huwandu, kuwedzera, uye kuti RFID yako yakavimbika sei mumashandisirwo akawanda.
Kuderedza Kurasika Kwechiratidzo
Unogona kurasikirwa nechiratidzo kana ukasagadzira system yako yeRFID zvakanaka. Dhizaini yeantenna isina kunaka kana masaini asina simba anogona kuita kuti matag awane simba shoma. Madaro marefu anoderedzawo chiratidzo. Kuti urambe wakasimba, shandisa antenna yakanaka uye simba rekudzora. Isa matag kure nezvinhu zvinovhara masaini. Sarudza frequency yakakodzera yeuhf inoenderana nezvaunoda. Kudzora impedance Muhurongwa hwePCB kunobatsira kumisa kuratidzwa kwechiratidzo. Madonhwe mapfupi uye kushandisa ma resistors kumagumo kunobatsira kuderedza kurasikirwa kwechiratidzo.
Kuderedza EMI neCrosstalk
Electromagnetic interference uye crosstalk matambudziko akajairika muuhf rfid systems. Matambudziko aya anogona kuderedza huwandu hwedata uye kukonzera njodzi dzekuchengetedza. Unogona kushandisa mhangura layers uye mafirimu ekudzivirira kudzivirira magetsi. Mapuranga epasi anobatsirawo kumisa kupindira. Isa machira pamusoro pezvikamu zvinonzwa ruzha. Shandisa machira ekufambisa mhepo pakugadzira madiki. Kuburikidza nekusona uye rubatsiro rwekupatsanura puranga repasi zvakare. Chati iri pazasi inoratidza kuti EMI inokanganisa sei masisitimu akasiyana eRFID:
Zano: Tarisa system yako nguva nenguva uye dzidzisa vashandi. Izvi zvinokubatsira kuwana nekugadzirisa matambudziko eEMI nekukurumidza.
Kutarisira Kugona Kwezvipukanana uye Kupinda Kwezvinhu Mukati
Kukwanisa kupinza simba remagetsi (parasitic capacitance) uye inductance zvinogona kuderedza huwandu uye kuwedzera kwemuverengi wako weRFID. Shandisa dhizaini yakafanana yemaantenna kuti simba remagineti rirambe rakafanana. Ita kuti kureba kwematrace kuenzane uye kuenzanisa impedance pakati pema differential pairs. Shandisa ma capacitor akasiyana pamwe chete kuchenesa tambo dzemagetsi. Isa ma capacitor pedyo nemapini emagetsi uye chengeta macurrent loops madiki. Usaise mapuraneti epasi pasi pema coils. Shandisa mapuraneti epasi akapatsanurwa kuti uchengetedze hunhu hwemhando yepamusoro. Matanho aya anobatsira system yako yeRFID kuti irambe yakavimbika uye yakachengeteka mukushandiswa kwese.
Zvikanganiso Zvakajairika Zvekugadzira uye Maitiro Ekuzvigadzirisa
Paunenge uchigadzira RFID reader, unogona kuita zvikanganiso zvinoderedza kuti inogona kuverenga kusvika papi, kuti yakarurama sei, uye kuti yakachengeteka zvakadii. Unogona kudzivirira matambudziko aya nekunzwisisa kuti mapuraneti epasi, dziviriro, uye kuiswa kweantenna zvinokanganisa sei mashandiro eRFID.
Kugadzika Kwendege Yakaipa Pasi
Ndege yepasi inopa muverengi wako a nzvimbo yekutarisa yakagadzikanaKana ukasagadzira zvakanaka, masaini anogona kusvetuka-svetuka uye simba shoma rinopinda. Izvi zvinoita kuti RFID ipfupike. Nzvimbo yakanaka yepasi inobatsirawo kudzora kupararira kwemasaini uye kuenzana ne impedance. Chengeta masaini eantenna zvirinani 10mm kure nepasi kudzivirira kudzima tambo. Gara uchitevera pepa redata rehukuru hwendege yepasi. Kana tag yako iri pedyo nesimbi,ndege yepasi inogona kubatsira kuderedza migumisiro yezvakatipoteredza pamhinduro yetag.
Mistake | Chii Chinoitika | Nzira yekugadzirisa sei |
|---|---|---|
Hapana nzvimbo yakakwana kubva pasi | Madonhwe eantenna ari pedyo zvakanyanya anogona kukonzera kuvharika. | Chengeta nzvimbo inosvika 10mm kuti ushande zvakanaka. |
Kuregeredza migumisiro ye substrate | Zvinhu zviri pasi zvinoshandura kurira kwe antenna. | Shandisa zvinhu chaizvo zvinokosha pakuverenga nekuenzanisa. |
Zano: Shandisa purani yepasi inoramba ichienderera mberi uye dzivisa kupindirana kwepuratifomu dzePCB dzine mapuranga akawanda. Izvi zvinoita kuti muverengi wako agare akasimba uye zvinovandudza nzvimbo yekuverenga.
Dhizaini Isina Kusimba Yekudzivirira uye Yekuvharira
Kudzivirira kunoita kuti ruzha rwekunze rusasvike kure nemuverengi wako. Kana ukasagadzira nzvimbo yacho zvakanaka, zviratidzo zvinogona kubuda nepaburi kana maburi. Maburi makuru anogona kurega zviratidzo zvichibuda uye kuita kuti RFID isashande zvakanaka. Chengeta maburi madiki uye shandisa mashoma sezvinobvira. Tarisa majoini nemaseam ari munzvimbo yacho. Nzvimbo yakanaka inoita kuti system yako ive yakachengeteka uye inodzivirira kubva pakukanganiswa.
Kuregeredza Kuiswa kweAntenna uye Kutungamirirwa
Kwaunoisa antenna uye maitirwo ayo kwakakosha zvikuru. Kana ukaisa antenna panzvimbo isiriyo kana kuti usingafungi nezvekwairi, huwandu hwenzvimbo uye kurongeka kwayo zvinodzikira. Isa antenna pedyo nemupendero kana kona yePCB kuderedza kupindira. Usaise antenna pamusoro pemapurani epasi kana simbi. Paunenge uchiyedza, edza nzvimbo dzakasiyana pamativi marefu kana mapfupi ebhodhi. Kuti uwane mhedzisiro yakanaka, paradzanisa antenna dzinoshandisa ma frequency akafanana uye udzitenderedze pa 90 degrees. Gara uchisiya nzvimbo yekubatanidza impedance uye isa ma matching network padyo ne antenna. Izvi zvinokubatsira kuti uwane huwandu hwakanakisa uye kuchengetedzeka kubva kumuverengi wako.
Kudanwa: Gara uchiyedza sisitimu yako mumamiriro ezvinhu chaiwo, kwete murabhoritari chete. Izvi zvinokubatsira kuwana matambudziko anokonzerwa nezvinhu nemagadzirirwo usati wapedza dhizaini yako.
Dhizaini yebhodhi rako redunhu yakakosha zvikuru pakunzwa kweRFID reader. Unofanira kufunga nezvekwaunoisa antenna. Maitiro aunoita antenna anobatsirawo. Kurongeka kwePCB kunobatsira muverengi kuwana ma tag zviri nani. Ita shuwa kuti frequency inoramba yakadzikama. Tarisa polarization uye dzora ruzha kuti system ishande zvakanaka. Edza dhizaini yako kakawanda uye gadzirisa matambudziko nekukurumidza. Shandisa zvinhu zvinorasikirwa nesimba shoma, senge Rogers 4350B kana ma laminates akavakirwa paPTFE. Ita kuti marongerwo ne impedance zvive nani. Edza nzira dzepamusoro dzekugadzira bhodhi rako. Matanho aya anobatsira masisitimu ako eRFID kushanda zvakanaka.
FAQ
Chii chinonyanya kukosha pakunzwa kweRFID reader?
Unofanira kutanga watarisa dhizaini yeantenna. Saizi yeantenna, chimiro, uye kwaunoiisa ndizvo zvinosarudza kuti muverengi wako anowana sei ma tag. Kusarudza antenna yakanaka kunokubatsira kuti uwane mutsetse wakanaka uye kururama kuri nani.
Zvinhu zvePCB zvinokanganisa sei mashandiro eRFID?
Pcb zvinhu zvinoshandura kufamba kwemasaini. Kana ukashandisa zvinhu zvemhando yepamusoro zvakaita seRogers 4350B, unorasikirwa nemasaini mashoma. Izvi zvinoita kuti RFID reader yako ishande zviri nani, kunyanya pamafrequencies akakwira.
Ndingaisa antenna chero kupi paPCB here?
Kwete, haugone kuisa antenna chero kwaunoda. Ichengete kure nesimbi nepasi. Isa pedyo nemucheto webhodhi kuti uwane mhedzisiro yakanaka.
Sei kugadzira pasi kuchikosha mukugadzirwa kweRFID?
Kuisa pasi zvakanaka kunoderedza ruzha uye kumisa kukanganiswa. Unowana zviratidzo zvakajeka uye kuverenga kwakareba. Nguva dzose shandisa pasi rakasimba kuti uite zviri nani.
Ndingaderedza sei kupindira muRFID system yangu?
Shandisa chidziviriro chakakomberedza nzvimbo dzinonzwa kurwadza.
Chengetedza ma trace edhijitari neRF akasiyana.
Edza system yako munzvimbo chaidzo kuti uwane nekugadzirisa matambudziko eruzha.
